“…Debris flows are one of the most catastrophic phenomena in which water-laden masses surge down steep slopes; they can devastate villages and livelihoods (Cui et al, 2013a;Zhang et al, 2013;Takahashi, 2014;Ge et al, 2015;Zhao et al, 2016). The huge impulsive force can scour channel beds dramatically and aggregate the volume of debris flows from several to hundreds of times their initial volume (King et al, 2001;Hungr et al, 2005;Godt and Coe, 2007;Medina et al, 2008;Tang et al, 2011;Cui et al, 2013b;Ni et al, 2014).…”